Chaeles almost jackson



(No Model.)

0. A. JACKSON.

ELECTRIC MOTOR.

No. 289,541. Patented Dec. 4, 1883.

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UNTTED STATES PATENT CHARLES ALMON JACKSON, OF LAXVRENCE, MASSACHUSETTS, ASSIGNOE OF ONE-HALF TO D. F. ROBINSON, OF SAME PLACE.

ELECTRIC MOTOR.

SPECIFIOATISN forming part of Letters Patent No. 289,541, dated December 4, 1883,

Application filed Scptember18, 1883. (No model.)

To all whom, it may concern.-

Be it known that I, Ci-mRLEs ALnox JACK- soN, a citizen of the United States, residing at Lawrence, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Electric Motors and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to IO which it appertains to make and use the same,

reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form apart of this specification.

This invention relates to electric motors for various uses in the arts or for household purposes; and it consists in the'combination, with an electric armature-eseapement, of two pairs of electro-magnets, between which the armature of the escapement vibrates, and the fur ther combination, with the scape-wheel and its arbor, of a circuit-breaker composed of a circular disk, into the periphery of which is let a series of equidistant insulators, a pair of 2 5 springs, each alternately in circuit with the same battery being employed, which bear alternately upon the disk and upon an insulator, and the two being connected with the magnets in manner substantially as hereinafter de- 0 scribed, whereby when one pair of magnets is energized the other pair is depolarized and the armature attracted by each in rotation.

In the drawings, Figure l is a side elevation, Fig. 2 a vertical section, Fig. 3 a plan, and

3 5 Fig. l an end view, of my device.

1 N represent the two wires of an electric battery, connecting with the pole-cups O D, erected upon the tablet E of a duplex electric armature-escapement.

The duplex escapement is shown at F and its lever at G, the latter being fulcrumed to the top of a conducting metal post, H, erected upon a similar metal plate, I, which supports the operative parts upon the tablet E.

The armature of the lever G is shown at J as adapted to vibrate between two electromagnets, K K and L L, arranged, respectively, above and below such armature, and insulated from the plate I.

The scape-wheel is shown at N as secured to a horizontal shaft, O, of conducting metal, mounted in conducting-metal side standards, P P, erected upon the plate I.

Q represents a circular disk, also secured centrally to the shaft 0, alongside the scapewheel, this disk being converted into a circuit breaker by a series of insulated blocks, a a, &c., let into the periphery of such disk, these blocks being arranged, preferably, equidistant and at frequent intervals, and operating with two elastic springs, Z) Z), alternately in circuit with the two poles of the battery. The springs Z) Z) are secured at their lower ends to a block, 0, of insulating material, affixed to the plate I, the free end of the spring Z) being so situated as to bear upon the periphery of the disk Q, while the free end of the spring Z) bears upon one of the insulated blocks a, and vice versa, when the wheel moves one tooth.

The battery-wires P extend from the cup 0 to and connect with the plate I, as shown at (Z, thereby making such plate a part of the circuit, and th e standards 1? 1?, the shaft 0, scapewheel N, escapement F and its lever G, and the disk Q. The battery-pole N is divided, one branch, N extending from the cup D to the upper magnet, K K, thence to spring b, which, as before stated, operates, like the spring Z), alternately with the disk Q and its insulators a. The other branch, N, of the pole N connects with the lower magnets, L L, and from the latter extends to spring Z).

The operation of this device is as follows: Suppose the armature to be attracted to the cores of the lower magnet, L L, the finger b being in contact with the periphery of the disk Q, the finger Z) in contact with one of the in sulators a, and the upper magnet, K K, thereby cut off from the battery. The battery being let on, the circuit is closed with the wire 0 branch N and the upper magnet, K K, through plate 1, wire I and the spring Z), thence through the disk Q, its shaft 0, the scape-wheel N, eseapement F, and armature J, the result being that the armature is attracted to the cores of the upper magnet, K K, and the scape-wheel rotated one teeth, which reverses the position of the springs Z) Z) with respect to the disk Q and brings the spring b into contact with the disk, while the spring Z) is brought into 0011- 100 tact with one of the insulators a. The circuit by this movement of the scape-wheel is now broken through the upper magnet, K K, as the finger bis insulated from the latter, and closed through the lower magnet, L L, by way of the armature J, escapement F, scape-wheel N, shaft 0, disk Q, spring I), and wire N, thereby moving the scape-wheel one tooth, which again reverses the relative position of the springs and disk, and we return to our starting-point. This reversal of the polarity of the magnets and vibrations of the armature and intermittent advances of the disk are continuous so long as the battery is on. This reversal of the polarity of the magnets and vibrations of the armature and the intermittent advances of the disk become continuous under the energy of the the battery, and a sim-' ple, compact, and durable motor is produced.

I claim- In an electric motor, the combination of two alternately-acting electro-magnets with a single interposed armature, apivoted escapement connected to said armature, a ratchet-wheel driven solely by said escapement with a step- 25 by-step motion, a circuit-breaker turning with said ratchet-wheel, and provided with alternateinsulating-spaces and contact-spaces, and two springs bearing alternately on said spaces and connected, respectively, to said magnets, 0 said springs having also electrical connection with a battery or batteries, substantially as set forth.

In testimony whereof I affix my signature in presence of two, witnesses.

CHARLES ALMON JACKSON Witnesses:

F. CURTIS, A. F. HAYDEN. 

